Although it might seem counter-intuitive, making it more difficult for older people to walk will actually improve their mobility. Walking on unpredictable and uneven surfaces can improve balance and help reduce risk of falling. Working on this principle, researchers at Glasgow's University of Strathclyde in collaboration with Israeli medical products company Step of Mind Ltd. (SoM) have developed an innovative training shoe based on this principle called Re-Step that incorporates four motors on the bottom of each shoe to make it more difficult for the wearer to walk, therefore helping in rehabilitation from movement disorders such as those that result from stroke or brain trauma.